Figure 1.
Average maximum oxygen uptake in birth weight quarters.
Q1–Q4: Birth weight quarter 1–4 (Q1 = lowest quarter).
Table 1.
Twin Characteristics at the Start of the Study.
Table 2.
Regression Coefficients for Birth Weight in the Individual Analysis.
Table 3.
Regression Coefficients for Birth Weight: Mean of the Twin Pair and Difference within the Twin Pair.
Table 4.
Regression Coefficients for Δ Birth Weight in MZ and DZ twins (Pair Wise, Stratified Analysis).